4 files changed, 100 insertions, 0 deletions
diff --git a/test/fuzzing/client/client-fuzz-body.js b/test/fuzzing/client/client-fuzz-body.js
new file mode 100644
index 0000000..6643dda
--- /dev/null
+++ b/test/fuzzing/client/client-fuzz-body.js
@@ -0,0 +1,28 @@
+'use strict'
+
+const { request, errors } = require('../../..')
+
+const acceptableCodes = [
+  'ERR_INVALID_ARG_TYPE'
+]
+
+// TODO: could make this a class with some inbuilt functionality that we can inherit
+async function fuzz (netServer, results, buf) {
+  const body = buf
+  results.body = body
+  try {
+    const data = await request(`http://localhost:${netServer.address().port}`, { body })
+    data.body.destroy().on('error', () => {})
+  } catch (err) {
+    results.err = err
+    // Handle any undici errors
+    if (Object.values(errors).some(undiciError => err instanceof undiciError)) {
+      // Okay error
+    } else if (!acceptableCodes.includes(err.code)) {
+      console.log(`=== Headers: ${JSON.stringify(body)} ===`)
+      throw err
+    }
+  }
+}
+
+module.exports = fuzz
diff --git a/test/fuzzing/client/client-fuzz-headers.js b/test/fuzzing/client/client-fuzz-headers.js
new file mode 100644
index 0000000..84f3390
--- /dev/null
+++ b/test/fuzzing/client/client-fuzz-headers.js
@@ -0,0 +1,27 @@
+'use strict'
+
+const { request, errors } = require('../../..')
+
+const acceptableCodes = [
+  'ERR_INVALID_ARG_TYPE'
+]
+
+async function fuzz (netServer, results, buf) {
+  const headers = { buf: buf.toString() }
+  results.body = headers
+  try {
+    const data = await request(`http://localhost:${netServer.address().port}`, { headers })
+    data.body.destroy().on('error', () => {})
+  } catch (err) {
+    results.err = err
+    // Handle any undici errors
+    if (Object.values(errors).some(undiciError => err instanceof undiciError)) {
+      // Okay error
+    } else if (!acceptableCodes.includes(err.code)) {
+      console.log(`=== Headers: ${JSON.stringify(headers)} ===`)
+      throw err
+    }
+  }
+}
+
+module.exports = fuzz
diff --git a/test/fuzzing/client/client-fuzz-options.js b/test/fuzzing/client/client-fuzz-options.js
new file mode 100644
index 0000000..5be81b6
--- /dev/null
+++ b/test/fuzzing/client/client-fuzz-options.js
@@ -0,0 +1,38 @@
+'use strict'
+
+const { request, errors } = require('../../..')
+
+const acceptableCodes = [
+  'ERR_INVALID_URL',
+  // These are included because '\\ABC' is interpreted as a Windows UNC path and can cause these errors.
+  'ENOTFOUND',
+  'EAI_AGAIN',
+  'ECONNREFUSED'
+  // ----
+]
+
+async function fuzz (netServer, results, buf) {
+  const optionKeys = ['body', 'path', 'method', 'opaque', 'upgrade', buf]
+  const options = {}
+  for (const optionKey of optionKeys) {
+    if (Math.random() < 0.5) {
+      options[optionKey] = buf.toString()
+    }
+  }
+  results.options = options
+  try {
+    const data = await request(`http://localhost:${netServer.address().port}`, options)
+    data.body.destroy().on('error', () => {})
+  } catch (err) {
+    results.err = err
+    // Handle any undici errors
+    if (Object.values(errors).some(undiciError => err instanceof undiciError)) {
+      // Okay error
+    } else if (!acceptableCodes.includes(err.code)) {
+      console.log(`=== Options: ${JSON.stringify(options)} ===`)
+      throw err
+    }
+  }
+}
+
+module.exports = fuzz
diff --git a/test/fuzzing/client/index.js b/test/fuzzing/client/index.js
new file mode 100644
index 0000000..dac3d98
--- /dev/null
+++ b/test/fuzzing/client/index.js
@@ -0,0 +1,7 @@
+'use strict'
+
+module.exports = {
+  clientFuzzBody: require('./client-fuzz-body'),
+  clientFuzzHeaders: require('./client-fuzz-headers'),
+  clientFuzzOptions: require('./client-fuzz-options')
+}