From d8596208167dae7ce986174ee32cabe7fa86b5eb Mon Sep 17 00:00:00 2001
From: Hannes Verlinde <hverlind@fb.com>
Date: Wed, 24 Jun 2015 01:19:26 -0700
Subject: [PATCH] Add unit tests for RCTShadowView.

---
 .../UIExplorerUnitTests/RCTShadowViewTests.m  | 99 +++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 Examples/UIExplorer/UIExplorerUnitTests/RCTShadowViewTests.m

diff --git a/Examples/UIExplorer/UIExplorerUnitTests/RCTShadowViewTests.m b/Examples/UIExplorer/UIExplorerUnitTests/RCTShadowViewTests.m
new file mode 100644
index 000000000..afe708c5e
--- /dev/null
+++ b/Examples/UIExplorer/UIExplorerUnitTests/RCTShadowViewTests.m
@@ -0,0 +1,99 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+#import <XCTest/XCTest.h>
+
+#import "RCTShadowView.h"
+
+@interface RCTShadowViewTests : XCTestCase
+
+@end
+
+@implementation RCTShadowViewTests
+
+// Just a basic sanity test to ensure css-layout is applied correctly in the context of our shadow view hierarchy.
+//
+// ====================================
+// ||             header             ||
+// ====================================
+// ||       ||              ||       ||
+// || left  ||    center    || right ||
+// ||       ||              ||       ||
+// ====================================
+// ||             footer             ||
+// ====================================
+//
+- (void)testApplyingLayoutRecursivelyToShadowView
+{
+  RCTShadowView *leftView = [self _shadowViewWithStyle:^(css_style_t *style) {
+    style->flex = 1;
+  }];
+
+  RCTShadowView *centerView = [self _shadowViewWithStyle:^(css_style_t *style) {
+    style->flex = 2;
+    style->margin[0] = 10;
+    style->margin[2] = 10;
+  }];
+
+  RCTShadowView *rightView = [self _shadowViewWithStyle:^(css_style_t *style) {
+    style->flex = 1;
+  }];
+
+  RCTShadowView *mainView = [self _shadowViewWithStyle:^(css_style_t *style) {
+    style->flex_direction = CSS_FLEX_DIRECTION_ROW;
+    style->flex = 2;
+    style->margin[1] = 10;
+    style->margin[3] = 10;
+  }];
+
+  [mainView insertReactSubview:leftView atIndex:0];
+  [mainView insertReactSubview:centerView atIndex:1];
+  [mainView insertReactSubview:rightView atIndex:2];
+
+  RCTShadowView *headerView = [self _shadowViewWithStyle:^(css_style_t *style) {
+    style->flex = 1;
+  }];
+
+  RCTShadowView *footerView = [self _shadowViewWithStyle:^(css_style_t *style) {
+    style->flex = 1;
+  }];
+
+  RCTShadowView *parentView = [self _shadowViewWithStyle:^(css_style_t *style) {
+    style->flex_direction = CSS_FLEX_DIRECTION_COLUMN;
+    style->padding[0] = 10;
+    style->padding[1] = 10;
+    style->padding[2] = 10;
+    style->padding[3] = 10;
+    style->dimensions[0] = 440;
+    style->dimensions[1] = 440;
+  }];
+
+  [parentView insertReactSubview:headerView atIndex:0];
+  [parentView insertReactSubview:mainView atIndex:1];
+  [parentView insertReactSubview:footerView atIndex:2];
+
+  [parentView collectRootUpdatedFrames:nil parentConstraint:CGSizeZero];
+
+  XCTAssertTrue(CGRectEqualToRect([parentView measureLayoutRelativeToAncestor:parentView], CGRectMake(0, 0, 440, 440)));
+  XCTAssertTrue(UIEdgeInsetsEqualToEdgeInsets([parentView paddingAsInsets], UIEdgeInsetsMake(10, 10, 10, 10)));
+
+  XCTAssertTrue(CGRectEqualToRect([headerView measureLayoutRelativeToAncestor:parentView], CGRectMake(10, 10, 420, 100)));
+  XCTAssertTrue(CGRectEqualToRect([mainView measureLayoutRelativeToAncestor:parentView], CGRectMake(10, 120, 420, 200)));
+  XCTAssertTrue(CGRectEqualToRect([footerView measureLayoutRelativeToAncestor:parentView], CGRectMake(10, 330, 420, 100)));
+
+  XCTAssertTrue(CGRectEqualToRect([leftView measureLayoutRelativeToAncestor:parentView], CGRectMake(10, 120, 100, 200)));
+  XCTAssertTrue(CGRectEqualToRect([centerView measureLayoutRelativeToAncestor:parentView], CGRectMake(120, 120, 200, 200)));
+  XCTAssertTrue(CGRectEqualToRect([rightView measureLayoutRelativeToAncestor:parentView], CGRectMake(330, 120, 100, 200)));
+}
+
+- (RCTShadowView *)_shadowViewWithStyle:(void(^)(css_style_t *style))styleBlock
+{
+  RCTShadowView *shadowView = [[RCTShadowView alloc] init];
+
+  css_style_t style = shadowView.cssNode->style;
+  styleBlock(&style);
+  shadowView.cssNode->style = style;
+
+  return shadowView;
+}
+
+@end