This change adds some basic examples of generate_tests. While working

on many DOM tests there are often times when you want an exhaustive round of tests, such as for parameter range validation. I found that we often break these apart and repeat the calls over and over again when a simple generate_tests would simplify the code greatly.
bocoup · May 20, 2016 · c3b2416 · c3b2416
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commit c3b2416
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diff --git a/examples/apisample17.html b/examples/apisample17.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+<title>Sample for using generate_tests to create a series of tests that share the same callback.</title>
+<script src="../testharness.js"></script>
+<script src="../testharnessreport.js"></script>
+</head>
+<body>
+<script>
+// generate_tests takes an array of arrays that define tests
+// but lets pass it an empty array and verify it does nothing.
+function null_callback() {
+	throw "null_callback should not be called.";
+}
+generate_tests(null_callback, []);
+
+// Generate 3 tests specifying the name and one parameter
+function validate_arguments(arg1) {
+	assert_equals(arg1, 1, "Ensure that we get our expected argument");
+}
+generate_tests(validate_arguments, [
+	["first test", 1],
+	["second test", 1],
+	["third test", 1],
+]);
+
+// Generate a test passing in a properties object that is shared across tests.
+function validate_properties() {
+	assert_true(this.properties.sentinel, "Ensure that we got the right properties object.");
+}
+generate_tests(validate_properties, [["sentinel check 1"], ["sentinel check 2"]], {sentinel: true});
+
+// Generate a test passing in a properties object that is shared across tests.
+function validate_separate_properties() {
+	if (this.name === "sentinel check 1 unique properties") {
+		assert_true(this.properties.sentinel, "Ensure that we got the right properties object. Expect sentinel: true.");
+	}
+	else {
+		assert_false(this.properties.sentinel, "Ensure that we got the right properties object. Expect sentinel: false.");
+	}
+}
+generate_tests(validate_separate_properties, [["sentinel check 1 unique properties"], ["sentinel check 2 unique properties"]], [{sentinel: true}, {sentinel: false}]);
+
+// Finally generate a complicated set of tests from another data source
+var letters = ["a", "b", "c", "d", "e", "f"];
+var numbers = [0, 1, 2, 3, 4, 5];
+function validate_related_arguments(arg1, arg2) {
+	assert_equals(arg1.charCodeAt(0) - "a".charCodeAt(0), arg2, "Ensure that we can map letters to numbers.");
+}
+function format_as_test(letter, index, letters) {
+	return ["Test to map " + letter + " to " + numbers[index], letter, numbers[index]];
+}
+generate_tests(validate_related_arguments, letters.map(format_as_test));
+</script>
+</body>
+</html>
+
+
+