Fix lack of parse for fiam modal action button (#8140)

* fix lack of parse for modal action button

* add test for modal button text color

Author: fumito-ito

FirebaseInAppMessaging/Sources/Data/FIRIAMFetchResponseParser.m

@@ -230,6 +230,8 @@ - (FIRIAMMessageDefinition *)convertToMessageDefinitionWithMessageDict:(NSDictio
 
       imageURLStr = modalNode[@"imageUrl"];
       actionButtonText = modalNode[@"actionButton"][@"text"][@"text"];
+      btnTxtColor =
+          [UIColor firiam_colorWithHexString:modalNode[@"actionButton"][@"text"][@"hexColor"]];
       btnBgColor =
           [UIColor firiam_colorWithHexString:modalNode[@"actionButton"][@"buttonHexColor"]];
 

FirebaseInAppMessaging/Tests/Unit/FIRIAMFetchResponseParserTests.m

@@ -140,6 +140,8 @@ - (void)testRegularConversion {
   XCTAssertEqualObjects(@"687787988989", sixth.renderData.messageID);
   XCTAssertEqualObjects(@"Super Bowl LV", sixth.renderData.name);
   XCTAssertEqualObjects(@"Eagles are going to win", sixth.renderData.contentData.titleText);
+  XCTAssertEqualObjects(sixth.renderData.renderingEffectSettings.btnTextColor,
+                        [UIColor firiam_colorWithHexString:@"#1a0dab"]);
   XCTAssertNil(sixth.renderData.contentData.bodyText);
   XCTAssertNil(sixth.appData);
   XCTAssertNotNil(sixth.experimentPayload);

FirebaseInAppMessaging/Tests/Unit/TestJsonDataFromFetch.txt

@@ -240,6 +240,16 @@
             "text": "Eagles are going to win",
             "hexColor": "#004953"
           },
+          "actionButton": {
+            "text": {
+              "text": "Open",
+              "hexColor": "#1a0dab"
+            },
+            "buttonHexColor": "#000000"
+          },
+          "action": {
+            "actionUrl": "https://www.google.com"
+          },
           "backgroundHexColor": "#ffffff"
         }
       },