chore(client): add gdUnit4 test framework addon

Vendor gdUnit4 for Godot 4 client testing (D-030).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/addons/gdUnit4/test/asserts/GdUnitVariantAssertThatTest.gd

@@ -0,0 +1,116 @@
+extends GdUnitTestSuite
+
+
+func test_is_equal_success() -> void:
+	assert_that(3 as Variant).is_equal(3)
+	assert_that(3.14 as Variant).is_equal(3.14)
+	assert_that("3" as Variant).is_equal("3")
+	assert_that(true as Variant).is_equal(true)
+	assert_that(Vector2.ONE as Variant).is_equal(Vector2.ONE)
+	assert_that({a=1, b=2} as Variant).is_equal({a=1, b=2})
+	assert_that([1,2,3] as Variant).is_equal([1,2,3])
+	assert_that(RefCounted.new() as Variant).is_equal(RefCounted.new())
+
+
+func test_is_equal_fail() -> void:
+	# bool vs int
+	assert_failure(func()->void:
+		assert_that(true as Variant).is_equal(1))\
+		.is_failed()
+
+	# bool vs string
+	assert_failure(func()->void:
+		assert_that(true as Variant).is_equal("true"))\
+		.is_failed()
+
+	# int vs string
+	assert_failure(func()->void:
+			assert_that(3 as Variant).is_equal("3"))\
+		.is_failed()
+
+	# float vs string
+	assert_failure(func()->void:
+			assert_that(3.14 as Variant).is_equal("3.14"))\
+		.is_failed()
+
+	# string vs int
+	assert_failure(func()->void:
+			assert_that("3" as Variant).is_equal(3))\
+		.is_failed()
+
+	# string vs float
+	assert_failure(func()->void:
+		assert_that("3.14" as Variant).is_equal(3.14))\
+		.is_failed()
+
+	# vector vs string
+	assert_failure(func()->void:
+		assert_that(Vector2.ONE as Variant).is_equal("ONE"))\
+		.is_failed()
+
+	# dictionary vs string
+	assert_failure(func()->void:
+		assert_that({a=1, b=2} as Variant).is_equal("FOO"))\
+		.is_failed()
+
+	# array vs string
+	assert_failure(func()->void:
+		assert_that([1,2,3] as Variant).is_equal("FOO"))\
+		.is_failed()
+
+	# object vs string
+	assert_failure(func()->void:
+		assert_that(RefCounted.new() as Variant).is_equal("FOO"))\
+		.is_failed()
+
+
+func test_is_not_equal_success() -> void:
+	assert_that(3 as Variant).is_not_equal(4)
+	assert_that(3.14 as Variant).is_not_equal(3.15)
+	assert_that("3" as Variant).is_not_equal("33")
+	assert_that(true as Variant).is_not_equal(false)
+	assert_that(Vector2.ONE as Variant).is_not_equal(Vector2.UP)
+	assert_that({a=1, b=2} as Variant).is_not_equal({a=1, b=3})
+	assert_that([1,2,3] as Variant).is_not_equal([1,2,4])
+	assert_that(RefCounted.new() as Variant).is_not_equal(null)
+
+
+func test_is_not_equal_fail() -> void:
+	# bool vs int
+	assert_failure(func()->void:
+		assert_that(true as Variant).is_not_equal(true)
+		)\
+		.is_failed()
+
+
+	assert_failure(func()->void:
+			assert_that(3 as Variant).is_not_equal(3))\
+		.is_failed()
+
+	assert_failure(func()->void:
+			assert_that(3.14 as Variant).is_not_equal(3.14))\
+		.is_failed()
+
+	assert_failure(func()->void:
+			assert_that("3" as Variant).is_not_equal("3"))\
+		.is_failed()
+
+	# vector vs string
+	assert_failure(func()->void:
+		assert_that(Vector2.ONE as Variant).is_not_equal(Vector2.ONE))\
+		.is_failed()
+
+	# dictionary vs string
+	assert_failure(func()->void:
+		assert_that({a=1, b=2} as Variant).is_not_equal({a=1, b=2}))\
+		.is_failed()
+
+	# array vs string
+	assert_failure(func()->void:
+		assert_that([1,2,3] as Variant).is_not_equal([1,2,3]))\
+		.is_failed()
+
+	# object vs string
+	assert_failure(func()->void:
+		assert_that(RefCounted.new() as Variant).is_not_equal(RefCounted.new()))\
+		.is_failed()