Adding upstream version 1.0.2.upstream/1.0.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 572 insertions, 0 deletions

diff --git a/testfiles/src/style-test.cpp b/testfiles/src/style-test.cpp
new file mode 100644
index 0000000..fea2901
--- /dev/null
+++ b/testfiles/src/style-test.cpp
@@ -0,0 +1,572 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+/*
+ * Unit test for style properties.
+ *
+ * Author:
+ *   Tavmjong Bah <tavjong@free.fr>
+ *
+ * Copyright (C) 2017 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "gtest/gtest.h"
+
+#include "style.h"
+
+namespace {
+
+class StyleRead {
+
+public:
+  StyleRead(std::string src, std::string dst, std::string uri) :
+    src(std::move(src)), dst(std::move(dst)), uri(std::move(uri))
+  {
+  }
+
+  StyleRead(std::string src, std::string dst) :
+    src(std::move(src)), dst(std::move(dst)), uri("")
+  {
+  }
+
+  StyleRead(std::string const &src) :
+    src(src), dst(src), uri("")
+  {
+  }
+
+  std::string src;
+  std::string dst;
+  std::string uri;
+  
+};
+
+std::vector<StyleRead> getStyleData()
+{
+    StyleRead all_style_data[] = {
+
+        // Paint -----------------------------------------------
+        StyleRead("fill:none"), StyleRead("fill:currentColor"), StyleRead("fill:#ff00ff"),
+        StyleRead("fill:rgb(100%, 0%, 100%)", "fill:#ff00ff"), StyleRead("fill:rgb(255, 0, 255)", "fill:#ff00ff"),
+
+        // TODO - fix this to preserve the string
+        //    StyleRead("fill:url(#painter) rgb(100%, 0%, 100%)",
+        //	            "fill:url(#painter) #ff00ff", "#painter"     ),
+
+        // TODO - fix this to preserve the string
+        // StyleRead("fill:url(#painter) rgb(255, 0, 255)",
+        //	        "fill:url(#painter) #ff00ff", "#painter"),
+
+
+        StyleRead("fill:#ff00ff icc-color(colorChange, 0.1, 0.5, 0.1)"),
+
+        //  StyleRead("fill:url(#painter)",                     "", "#painter"),
+        //  StyleRead("fill:url(#painter) none",                "", "#painter"),
+        //  StyleRead("fill:url(#painter) currentColor",        "", "#painter"),
+        //  StyleRead("fill:url(#painter) #ff00ff",             "", "#painter"),
+        //  StyleRead("fill:url(#painter) rgb(100%, 0%, 100%)", "", "#painter"),
+        //  StyleRead("fill:url(#painter) rgb(255, 0, 255)",    "", "#painter"),
+
+        //  StyleRead("fill:url(#painter) #ff00ff icc-color(colorChange, 0.1, 0.5, 0.1)", "", "#painter"),
+
+        //  StyleRead("fill:url(#painter) inherit",             "", "#painter"),
+
+        StyleRead("fill:inherit"),
+
+
+        // General tests (in general order of appearance in sp_style_read), SPIPaint tested above
+        StyleRead("visibility:hidden"), // SPIEnum
+        StyleRead("visibility:collapse"), StyleRead("visibility:visible"),
+        StyleRead("display:none"),     // SPIEnum
+        StyleRead("overflow:visible"), // SPIEnum
+        StyleRead("overflow:auto"),    // SPIEnum
+
+        StyleRead("color:#ff0000"), StyleRead("color:blue", "color:#0000ff"),
+        // StyleRead("color:currentColor"),  SVG 1.1 does not allow color value 'currentColor'
+
+        // Font shorthand
+        StyleRead("font:bold 12px Arial", "font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;"
+                                          "font-size:12px;line-height:normal;font-family:Arial"),
+        StyleRead("font:bold 12px/24px 'Times New Roman'",
+                  "font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:12px;line-"
+                  "height:24px;font-family:\'Times New Roman\'"),
+
+        // From CSS 3 Fonts (examples):
+        StyleRead("font: 12pt/15pt sans-serif", "font-style:normal;font-variant:normal;font-weight:normal;font-stretch:"
+                                                "normal;font-size:16px;line-height:15pt;font-family:sans-serif"),
+        // StyleRead("font: 80% sans-serif",
+        //	        "font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:80%;line-height:normal;font-family:sans-serif"),
+        // StyleRead("font: x-large/110% 'new century schoolbook', serif",
+        //	      "font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:x-large;line-height:110%;font-family:\'new
+        //century schoolbook\', serif"),
+        StyleRead("font: bold italic large Palatino, serif",
+                  "font-style:italic;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:large;line-"
+                  "height:normal;font-family:Palatino, serif"),
+        // StyleRead("font: normal small-caps 120%/120% fantasy",
+        //	      "font-style:normal;font-variant:small-caps;font-weight:normal;font-stretch:normal;font-size:120%;line-height:120%;font-family:fantasy"),
+        StyleRead("font: condensed oblique 12pt 'Helvetica Neue', serif;",
+                  "font-style:oblique;font-variant:normal;font-weight:normal;font-stretch:condensed;font-size:16px;"
+                  "line-height:normal;font-family:\'Helvetica Neue\', serif"),
+
+        StyleRead("font-family:sans-serif"), // SPIString, text_private
+        StyleRead("font-family:Arial"),
+        // StyleRead("font-variant:normal;font-stretch:normal;-inkscape-font-specification:Nimbus Roman No9 L Bold
+        // Italic"),
+
+        // Needs to be fixed (quotes should be around each font-family):
+        StyleRead("font-family:Georgia, 'Minion Web'", "font-family:Georgia, \'Minion Web\'"),
+        StyleRead("font-size:12", "font-size:12px"), // SPIFontSize
+        StyleRead("font-size:12px"), StyleRead("font-size:12pt", "font-size:16px"), StyleRead("font-size:medium"),
+        StyleRead("font-size:smaller"),
+        StyleRead("font-style:italic"),       // SPIEnum
+        StyleRead("font-variant:small-caps"), // SPIEnum
+        StyleRead("font-weight:100"),         // SPIEnum
+        StyleRead("font-weight:normal"), StyleRead("font-weight:bolder"),
+        StyleRead("font-stretch:condensed"), // SPIEnum
+
+        StyleRead("font-variant-ligatures:none"), // SPILigatures
+        StyleRead("font-variant-ligatures:normal"), StyleRead("font-variant-ligatures:no-common-ligatures"),
+        StyleRead("font-variant-ligatures:discretionary-ligatures"),
+        StyleRead("font-variant-ligatures:historical-ligatures"), StyleRead("font-variant-ligatures:no-contextual"),
+        StyleRead("font-variant-ligatures:common-ligatures", "font-variant-ligatures:normal"),
+        StyleRead("font-variant-ligatures:contextual", "font-variant-ligatures:normal"),
+        StyleRead("font-variant-ligatures:no-common-ligatures historical-ligatures"),
+        StyleRead("font-variant-ligatures:historical-ligatures no-contextual"),
+        StyleRead("font-variant-position:normal"), StyleRead("font-variant-position:sub"),
+        StyleRead("font-variant-position:super"), StyleRead("font-variant-caps:normal"),
+        StyleRead("font-variant-caps:small-caps"), StyleRead("font-variant-caps:all-small-caps"),
+        StyleRead("font-variant-numeric:normal"), StyleRead("font-variant-numeric:lining-nums"),
+        StyleRead("font-variant-numeric:oldstyle-nums"), StyleRead("font-variant-numeric:proportional-nums"),
+        StyleRead("font-variant-numeric:tabular-nums"), StyleRead("font-variant-numeric:diagonal-fractions"),
+        StyleRead("font-variant-numeric:stacked-fractions"), StyleRead("font-variant-numeric:ordinal"),
+        StyleRead("font-variant-numeric:slashed-zero"), StyleRead("font-variant-numeric:tabular-nums slashed-zero"),
+        StyleRead("font-variant-numeric:tabular-nums proportional-nums", "font-variant-numeric:proportional-nums"),
+
+        StyleRead("font-variation-settings:'wght' 400"),
+        StyleRead("font-variation-settings:'wght'  400", "font-variation-settings:'wght' 400"),
+        StyleRead("font-variation-settings:'wght' 400, 'slnt' 0.5", "font-variation-settings:'slnt' 0.5, 'wght' 400"),
+
+        // Should be moved down
+        StyleRead("text-indent:12em"),  // SPILength?
+        StyleRead("text-align:center"), // SPIEnum
+
+        // SPITextDecoration
+        // The default value for 'text-decoration-color' is 'currentColor', but
+        // we cannot set the default to that value yet. (We need to switch
+        // SPIPaint to SPIColor and then add the ability to set default.)
+        // StyleRead("text-decoration: underline",
+        //          "text-decoration: underline;text-decoration-line: underline;text-decoration-color:currentColor"),
+        // StyleRead("text-decoration: overline underline",
+        //          "text-decoration: underline overline;text-decoration-line: underline
+        //          overline;text-decoration-color:currentColor"),
+
+        StyleRead("text-decoration: underline wavy #0000ff",
+                  "text-decoration: underline;text-decoration-line: "
+                  "underline;text-decoration-style:wavy;text-decoration-color:#0000ff"),
+        StyleRead("text-decoration: double overline underline #ff0000",
+                  "text-decoration: underline overline;text-decoration-line: underline "
+                  "overline;text-decoration-style:double;text-decoration-color:#ff0000"),
+
+        // SPITextDecorationLine
+        StyleRead("text-decoration-line: underline", "text-decoration: underline;text-decoration-line: underline"),
+
+        // SPITextDecorationStyle
+        StyleRead("text-decoration-style:solid"), StyleRead("text-decoration-style:dotted"),
+
+        // SPITextDecorationColor
+        StyleRead("text-decoration-color:#ff00ff"),
+
+        // Should be moved up
+        StyleRead("line-height:24px"), // SPILengthOrNormal
+        StyleRead("line-height:1.5"),
+        StyleRead("letter-spacing:2px"), // SPILengthOrNormal
+        StyleRead("word-spacing:2px"),   // SPILengthOrNormal
+        StyleRead("word-spacing:normal"),
+        StyleRead("text-transform:lowercase"), // SPIEnum
+        // ...
+        StyleRead("baseline-shift:baseline"), // SPIBaselineShift
+        StyleRead("baseline-shift:sub"), StyleRead("baseline-shift:12.5%"), StyleRead("baseline-shift:2px"),
+
+        StyleRead("opacity:0.1"), // SPIScale24
+        // ...
+        StyleRead("stroke-width:2px"),      // SPILength
+        StyleRead("stroke-linecap:round"),  // SPIEnum
+        StyleRead("stroke-linejoin:round"), // SPIEnum
+        StyleRead("stroke-miterlimit:4"),   // SPIFloat
+        StyleRead("marker:url(#Arrow)"),    // SPIString
+        StyleRead("marker-start:url(#Arrow)"), StyleRead("marker-mid:url(#Arrow)"), StyleRead("marker-end:url(#Arrow)"),
+        StyleRead("stroke-opacity:0.5"), // SPIScale24
+        // Currently inkscape handle unit conversion in dasharray but need
+        // a active document to do it, so we can't include in any test
+        StyleRead("stroke-dasharray:0, 1, 0, 1"), // SPIDashArray
+        StyleRead("stroke-dasharray:0 1 0 1", "stroke-dasharray:0, 1, 0, 1"),
+        StyleRead("stroke-dasharray:0  1  2  3", "stroke-dasharray:0, 1, 2, 3"),
+        StyleRead("stroke-dashoffset:13"), // SPILength
+        StyleRead("stroke-dashoffset:10px"),
+        // ...
+        // StyleRead("filter:url(#myfilter)"),                   // SPIFilter segfault in read
+        StyleRead("filter:inherit"),
+
+        StyleRead("opacity:0.1;fill:#ff0000;stroke:#0000ff;stroke-width:2px"),
+        StyleRead("opacity:0.1;fill:#ff0000;stroke:#0000ff;stroke-width:2px;stroke-dasharray:1, 2, 3, "
+                  "4;stroke-dashoffset:15"),
+
+        StyleRead("paint-order:stroke"), // SPIPaintOrder
+        StyleRead("paint-order:normal"),
+        StyleRead("paint-order: markers stroke   fill", "paint-order:markers stroke fill"),
+
+        // !important  (in order of appearance in style-internal.h)
+        StyleRead("stroke-miterlimit:4 !important"), // SPIFloat
+        StyleRead("stroke-opacity:0.5 !important"),  // SPIScale24
+        StyleRead("stroke-width:2px !important"),    // SPILength
+        StyleRead("line-height:24px !important"),    // SPILengthOrNormal
+        StyleRead("line-height:normal !important"),
+        StyleRead("font-stretch:condensed !important"), // SPIEnum
+        StyleRead("marker:url(#Arrow) !important"),     // SPIString
+        StyleRead("color:#0000ff !important"),          // SPIColor
+        StyleRead("fill:none !important"),              // SPIPaint
+        StyleRead("fill:currentColor !important"), StyleRead("fill:#ff00ff !important"),
+        StyleRead("paint-order:stroke !important"), // SPIPaintOrder
+        StyleRead("paint-order:normal !important"),
+        StyleRead("stroke-dasharray:0, 1, 0, 1 !important"), // SPIDashArray
+        StyleRead("font-size:12px !important"),              // SPIFontSize
+        StyleRead("baseline-shift:baseline !important"),     // SPIBaselineShift
+        StyleRead("baseline-shift:sub !important"),
+        // StyleRead("text-decoration-line: underline !important"),         // SPITextDecorationLine
+
+    };
+
+    size_t count = sizeof(all_style_data) / sizeof(all_style_data[0]);
+    std::vector<StyleRead> vect(all_style_data, all_style_data + count);
+    return vect;
+}
+
+TEST(StyleTest, Read) {
+  std::vector<StyleRead> all_style = getStyleData();
+  EXPECT_GT(all_style.size(), 0);
+  for (auto i : all_style) {
+
+    SPStyle style;
+    style.mergeString (i.src.c_str());
+
+    if (!i.uri.empty()) {
+      //EXPECT_EQ (style.fill.value.href->getURI()->toString(), i.uri);
+    }
+
+    std::string out = style.write();
+    if (i.dst.empty()) {
+      // std::cout << "out:   " << out   << std::endl;
+      // std::cout << "i.src: " << i.src << std::endl;
+      EXPECT_EQ (out, i.src);
+    } else {
+      // std::cout << "out:   " << out   << std::endl;
+      // std::cout << "i.dst: " << i.dst << std::endl;
+      EXPECT_EQ (out, i.dst);
+    }
+  }
+}
+
+
+// ------------------------------------------------------------------------------------
+
+class StyleMatch {
+
+public:
+  StyleMatch(std::string src, std::string dst, bool const &match) :
+    src(std::move(src)), dst(std::move(dst)), match(match)
+  {
+  }
+
+  std::string src;
+  std::string dst;
+  bool        match;
+  
+};
+
+std::vector<StyleMatch> getStyleMatchData()
+{
+  StyleMatch all_style_data[] = {
+
+    // SPIFloat
+    StyleMatch("stroke-miterlimit:4",     "stroke-miterlimit:4",      true ),
+    StyleMatch("stroke-miterlimit:4",     "stroke-miterlimit:2",      false),
+    StyleMatch("stroke-miterlimit:4",     "",                         true ), // Default
+
+    // SPIScale24
+    StyleMatch("opacity:0.3",             "opacity:0.3",              true ),
+    StyleMatch("opacity:0.3",             "opacity:0.6",              false),
+    StyleMatch("opacity:1.0",             "",                         true ), // Default
+
+    // SPILength
+    StyleMatch("text-indent:3",           "text-indent:3",            true ),
+    StyleMatch("text-indent:6",           "text-indent:3",            false),
+    StyleMatch("text-indent:6px",         "text-indent:3",            false),
+    StyleMatch("text-indent:1px",         "text-indent:12pc",         false),
+    StyleMatch("text-indent:2ex",         "text-indent:2ex",          false),
+
+    // SPILengthOrNormal
+    StyleMatch("letter-spacing:normal",   "letter-spacing:normal",    true ),
+    StyleMatch("letter-spacing:2",        "letter-spacing:normal",    false),
+    StyleMatch("letter-spacing:normal",   "letter-spacing:2",         false),
+    StyleMatch("letter-spacing:5px",      "letter-spacing:5px",       true ),
+    StyleMatch("letter-spacing:10px",     "letter-spacing:5px",       false),
+    StyleMatch("letter-spacing:10em",     "letter-spacing:10em",      false),
+
+    // SPIEnum
+    StyleMatch("text-anchor:start",       "text-anchor:start",        true ),
+    StyleMatch("text-anchor:start",       "text-anchor:middle",       false),
+    StyleMatch("text-anchor:start",       "",                         true ), // Default
+    StyleMatch("text-anchor:start",       "text-anchor:junk",         true ), // Bad value
+
+    StyleMatch("font-weight:normal",      "font-weight:400",          true ),
+    StyleMatch("font-weight:bold",        "font-weight:700",          true ),
+
+
+    // SPIString and SPIFontString
+    StyleMatch("font-family:Arial",       "font-family:Arial",        true ),
+    StyleMatch("font-family:A B",         "font-family:A B",          true ),
+    StyleMatch("font-family:A B",         "font-family:A C",          false),
+    // Default is not set by class... value is NULL which cannot be compared
+    // StyleMatch("font-family:sans-serif",  "",                       true ), // Default
+
+    // SPIColor
+    StyleMatch("color:blue",              "color:blue",               true ),
+    StyleMatch("color:blue",              "color:red",                false),
+    StyleMatch("color:red",               "color:#ff0000",            true ),
+
+    // SPIPaint
+    StyleMatch("fill:blue",               "fill:blue",               true ),
+    StyleMatch("fill:blue",               "fill:red",                false),
+    StyleMatch("fill:currentColor",       "fill:currentColor",       true ),
+    StyleMatch("fill:url(#xxx)",          "fill:url(#xxx)",          true ),
+    // Needs URL defined as in test 1
+    //StyleMatch("fill:url(#xxx)",          "fill:url(#yyy)",          false),
+
+    // SPIPaintOrder
+    StyleMatch("paint-order:markers",     "paint-order:markers",     true ),
+    StyleMatch("paint-order:markers",     "paint-order:stroke",      false),
+    //StyleMatch("paint-order:fill stroke markers", "",                true ), // Default
+    StyleMatch("paint-order:normal",      "paint-order:normal",      true ),
+    //StyleMatch("paint-order:fill stroke markers", "paint-order:normal", true ),
+
+    // SPIDashArray
+    StyleMatch("stroke-dasharray:0 1 2 3","stroke-dasharray:0 1 2 3",true ),
+    StyleMatch("stroke-dasharray:0 1",    "stroke-dasharray:0 2",    false),
+
+    // SPIFilter
+
+    // SPIFontSize
+    StyleMatch("font-size:12px",          "font-size:12px",          true ),
+    StyleMatch("font-size:12px",          "font-size:24px",          false),
+    StyleMatch("font-size:12ex",          "font-size:24ex",          false),
+    StyleMatch("font-size:medium",        "font-size:medium",        true ),
+    StyleMatch("font-size:medium",        "font-size:large",         false),
+
+    // SPIBaselineShift
+    StyleMatch("baseline-shift:baseline", "baseline-shift:baseline", true ),
+    StyleMatch("baseline-shift:sub",      "baseline-shift:sub",      true ),
+    StyleMatch("baseline-shift:sub",      "baseline-shift:super",    false),
+    StyleMatch("baseline-shift:baseline", "baseline-shift:sub",      false),
+    StyleMatch("baseline-shift:10px",     "baseline-shift:10px",     true ),
+    StyleMatch("baseline-shift:10px",     "baseline-shift:12px",     false),
+
+
+    // SPITextDecorationLine
+    StyleMatch("text-decoration-line:underline", "text-decoration-line:underline", true ),
+    StyleMatch("text-decoration-line:underline", "text-decoration-line:overline",  false),
+    StyleMatch("text-decoration-line:underline overline", "text-decoration-line:underline overline", true ),
+    StyleMatch("text-decoration-line:none",      "", true ), // Default
+
+
+    // SPITextDecorationStyle
+    StyleMatch("text-decoration-style:solid",    "text-decoration-style:solid", true ),
+    StyleMatch("text-decoration-style:dotted",   "text-decoration-style:solid", false),
+    StyleMatch("text-decoration-style:solid",    "",   true ), // Default
+
+    // SPITextDecoration
+    StyleMatch("text-decoration:underline",          "text-decoration:underline", true ),
+    StyleMatch("text-decoration:underline",          "text-decoration:overline",  false),
+    StyleMatch("text-decoration:underline overline","text-decoration:underline overline",true ),
+    StyleMatch("text-decoration:overline underline","text-decoration:underline overline",true ),
+    // StyleMatch("text-decoration:none",               "text-decoration-color:currentColor", true ), // Default
+
+  };
+
+  size_t count = sizeof(all_style_data) / sizeof(all_style_data[0]);
+  std::vector<StyleMatch> vect(all_style_data, all_style_data + count);
+  return vect;
+}
+
+TEST(StyleTest, Match) {
+  std::vector<StyleMatch> all_style = getStyleMatchData();
+  EXPECT_GT(all_style.size(), 0);
+  for (auto i : all_style) {
+
+    SPStyle style_src;
+    SPStyle style_dst;
+
+    style_src.mergeString( i.src.c_str() );
+    style_dst.mergeString( i.dst.c_str() );
+
+    // std::cout << "Test:" << std::endl;
+    // std::cout << "  C: |" << i.src
+    // 	         << "|    |" << i.dst << "|" << std::endl;
+    // std::cout << "  S: |" << style_src.write( SP_STYLE_FLAG_IFSET )
+    // 	         << "|    |" << style_dst.write( SP_STYLE_FLAG_IFSET ) << "|" <<std::endl;
+
+    EXPECT_TRUE( (style_src == style_dst) == i.match );
+  }
+}
+
+// ------------------------------------------------------------------------------------
+
+class StyleCascade {
+
+public:
+  StyleCascade(std::string parent, std::string child, std::string result) :
+    parent(std::move(parent)), child(std::move(child)), result(std::move(result))
+  {
+  }
+
+  std::string parent;
+  std::string child;
+  std::string result;
+  
+};
+
+std::vector<StyleCascade> getStyleCascadeData()
+{
+
+  StyleCascade all_style_data[] = {
+
+    // SPIFloat
+    StyleCascade("stroke-miterlimit:6",   "stroke-miterlimit:2",   "stroke-miterlimit:2"    ),
+    StyleCascade("stroke-miterlimit:6",   "",                      "stroke-miterlimit:6"    ),
+    StyleCascade("",                      "stroke-miterlimit:2",   "stroke-miterlimit:2"    ),
+
+    // SPIScale24
+    StyleCascade("opacity:0.3",           "opacity:0.3",            "opacity:0.3"           ),
+    StyleCascade("opacity:0.3",           "opacity:0.6",            "opacity:0.6"           ),
+    // 'opacity' does not inherit
+    StyleCascade("opacity:0.3",           "",                       "opacity:1.0"           ),
+    StyleCascade("",                      "opacity:0.3",            "opacity:0.3"           ),
+    StyleCascade("opacity:0.5",           "opacity:inherit",        "opacity:0.5"           ),
+    StyleCascade("",                      "",                       "opacity:1.0"           ),
+
+    // SPILength
+    StyleCascade("text-indent:3",         "text-indent:3",          "text-indent:3"         ),
+    StyleCascade("text-indent:6",         "text-indent:3",          "text-indent:3"         ),
+    StyleCascade("text-indent:6px",       "text-indent:3",          "text-indent:3"         ),
+    StyleCascade("text-indent:1px",       "text-indent:12pc",       "text-indent:12pc"      ),
+    // ex, em cannot be equal
+    //StyleCascade("text-indent:2ex",       "text-indent:2ex",        "text-indent:2ex"       ),
+    StyleCascade("text-indent:3",         "",                       "text-indent:3"         ),
+    StyleCascade("text-indent:3",         "text-indent:inherit",    "text-indent:3"         ),
+
+    // SPILengthOrNormal
+    StyleCascade("letter-spacing:normal", "letter-spacing:normal",  "letter-spacing:normal" ), 
+    StyleCascade("letter-spacing:2",      "letter-spacing:normal",  "letter-spacing:normal" ), 
+    StyleCascade("letter-spacing:normal", "letter-spacing:2",       "letter-spacing:2"      ),
+    StyleCascade("letter-spacing:5px",    "letter-spacing:5px",     "letter-spacing:5px"    ),
+    StyleCascade("letter-spacing:10px",   "letter-spacing:5px",     "letter-spacing:5px"    ),
+    // ex, em cannot be equal
+    // StyleCascade("letter-spacing:10em",   "letter-spacing:10em",    "letter-spacing:10em"   ),    
+
+    // SPIEnum
+    StyleCascade("text-anchor:start",     "text-anchor:start",      "text-anchor:start"     ),
+    StyleCascade("text-anchor:start",     "text-anchor:middle",     "text-anchor:middle"    ),
+    StyleCascade("text-anchor:start",     "",                       "text-anchor:start"     ),
+    StyleCascade("text-anchor:start",     "text-anchor:junk",       "text-anchor:start"     ),
+    StyleCascade("text-anchor:end",       "text-anchor:inherit",    "text-anchor:end"       ),
+
+    StyleCascade("font-weight:400",       "font-weight:400",        "font-weight:400"       ),
+    StyleCascade("font-weight:400",       "font-weight:700",        "font-weight:700"       ),
+    StyleCascade("font-weight:400",       "font-weight:bolder",     "font-weight:700"       ),
+    StyleCascade("font-weight:700",       "font-weight:bolder",     "font-weight:900"       ),
+    StyleCascade("font-weight:400",       "font-weight:lighter",    "font-weight:100"       ),
+    StyleCascade("font-weight:200",       "font-weight:lighter",    "font-weight:100"       ),
+
+    StyleCascade("font-stretch:condensed","font-stretch:expanded",  "font-stretch:expanded" ),
+    StyleCascade("font-stretch:condensed","font-stretch:wider",     "font-stretch:semi-condensed" ),
+
+    // SPIString and SPIFontString
+
+    StyleCascade("font-variation-settings:'wght' 400", "",          "font-variation-settings:'wght' 400"),
+    StyleCascade("font-variation-settings:'wght' 100",
+                 "font-variation-settings:'wght' 400",
+                 "font-variation-settings:'wght' 400"),
+
+    // SPIPaint
+
+    // SPIPaintOrder
+
+    // SPIDashArray
+
+    // SPIFilter
+
+    // SPIFontSize
+
+    // SPIBaselineShift
+
+
+    // SPITextDecorationLine
+    StyleCascade("text-decoration-line:overline", "text-decoration-line:underline",
+    	         "text-decoration-line:underline"          ),
+
+    // SPITextDecorationStyle
+
+    // SPITextDecoration
+  };
+
+  size_t count = sizeof(all_style_data) / sizeof(all_style_data[0]);
+  std::vector<StyleCascade> vect(all_style_data, all_style_data + count);
+  return vect;
+
+}
+
+TEST(StyleTest, Cascade) {
+   std::vector<StyleCascade> all_style = getStyleCascadeData();
+  EXPECT_GT(all_style.size(), 0);
+  for (auto i : all_style) {
+    
+    SPStyle style_parent;
+    SPStyle style_child;
+    SPStyle style_result;
+
+    style_parent.mergeString( i.parent.c_str() );
+    style_child.mergeString(  i.child.c_str()  );
+    style_result.mergeString( i.result.c_str() );
+
+    // std::cout << "Test:" << std::endl;
+    // std::cout << " Input: ";
+    // std::cout << "  Parent: " << i.parent
+    //           << "  Child: "  << i.child
+    //           << "  Result: " << i.result << std::endl;
+    // std::cout << " Write: ";
+    // std::cout << "  Parent: " << style_parent.write( SP_STYLE_FLAG_IFSET )
+    //           << "  Child: "  << style_child.write( SP_STYLE_FLAG_IFSET )
+    //           << "  Result: " << style_result.write( SP_STYLE_FLAG_IFSET ) << std::endl;
+
+    style_child.cascade( &style_parent );
+
+    EXPECT_TRUE(style_child == style_result );
+  }
+}
+
+
+} // namespace
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :