e2e test util: Add func to verify supported platform

This commit adds a function which verifies if the platform on which this
test is running is supported to run test.

Signed-off-by: Suraj Deshmukh <suraj@kinvolk.io>

test/components/util/util.go

@@ -319,3 +319,23 @@ func (p *PortForwardInfo) WaitUntilForwardingAvailable(t *testing.T) {
 	}
 	p.findLocalPort(t)
 }
+
+// IsPlatformSupported takes in the test object and the map of supported platform. The function
+// detects the supported platform from environment variable. And if the platform is available in the
+// supported platforms provided then this returns true otherwise false.
+func IsPlatformSupported(t *testing.T, platforms map[string]interface{}) bool {
+	if _, ok := platforms["*"]; ok {
+		return true
+	}
+
+	platform := os.Getenv("PLATFORM")
+	if platform == "" {
+		t.Fatalf("env var PLATFORM was not set")
+	}
+
+	if _, ok := platforms[platform]; !ok {
+		return false
+	}
+
+	return true
+}