1 files changed, 62 insertions, 0 deletions
diff --git a/src/go/collectors/go.d.plugin/pkg/matcher/string_test.go b/src/go/collectors/go.d.plugin/pkg/matcher/string_test.go
new file mode 100644
index 000000000..1694efbd0
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/pkg/matcher/string_test.go
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package matcher
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+var stringMatcherTestCases = []struct {
+	line                          string
+	expr                          string
+	full, prefix, suffix, partial bool
+}{
+	{"", "", true, true, true, true},
+	{"abc", "", false, true, true, true},
+	{"power", "pow", false, true, false, true},
+	{"netdata", "data", false, false, true, true},
+	{"abc", "def", false, false, false, false},
+	{"soon", "o", false, false, false, true},
+}
+
+func TestStringFullMatcher_MatchString(t *testing.T) {
+	for _, c := range stringMatcherTestCases {
+		t.Run(c.line, func(t *testing.T) {
+			m := stringFullMatcher(c.expr)
+			assert.Equal(t, c.full, m.Match([]byte(c.line)))
+			assert.Equal(t, c.full, m.MatchString(c.line))
+		})
+	}
+}
+
+func TestStringPrefixMatcher_MatchString(t *testing.T) {
+	for _, c := range stringMatcherTestCases {
+		t.Run(c.line, func(t *testing.T) {
+			m := stringPrefixMatcher(c.expr)
+			assert.Equal(t, c.prefix, m.Match([]byte(c.line)))
+			assert.Equal(t, c.prefix, m.MatchString(c.line))
+		})
+	}
+}
+
+func TestStringSuffixMatcher_MatchString(t *testing.T) {
+	for _, c := range stringMatcherTestCases {
+		t.Run(c.line, func(t *testing.T) {
+			m := stringSuffixMatcher(c.expr)
+			assert.Equal(t, c.suffix, m.Match([]byte(c.line)))
+			assert.Equal(t, c.suffix, m.MatchString(c.line))
+		})
+	}
+}
+
+func TestStringPartialMatcher_MatchString(t *testing.T) {
+	for _, c := range stringMatcherTestCases {
+		t.Run(c.line, func(t *testing.T) {
+			m := stringPartialMatcher(c.expr)
+			assert.Equal(t, c.partial, m.Match([]byte(c.line)))
+			assert.Equal(t, c.partial, m.MatchString(c.line))
+		})
+	}
+}