ebiten: Add more tests (ShaderUnmatchedArgs)

shader_test.go

@@ -1191,6 +1191,53 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
 	Foo(1)
 	return position
 }
+`)); err == nil {
+		t.Errorf("error must be non-nil but was nil")
+	}
+
+	if _, err := ebiten.NewShader([]byte(`package main
+
+func Foo(x float) {
+}
+
+func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
+	Foo()
+	return position
+}
+`)); err == nil {
+		t.Errorf("error must be non-nil but was nil")
+	}
+
+	if _, err := ebiten.NewShader([]byte(`package main
+
+func Foo(x, y float) {
+}
+
+func Bar() (float, float, float) {
+	return 0, 1
+}
+
+func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
+	Foo(Bar())
+	return position
+}
+`)); err == nil {
+		t.Errorf("error must be non-nil but was nil")
+	}
+
+	if _, err := ebiten.NewShader([]byte(`package main
+
+func Foo(x, y, z float) {
+}
+
+func Bar() (float, float) {
+	return 0, 1
+}
+
+func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
+	Foo(Bar())
+	return position
+}
 `)); err == nil {
 		t.Errorf("error must be non-nil but was nil")
 	}