Inline the boxModel test, and correct unit test. Closes gh-781.

src/support.js

@@ -82,6 +82,9 @@ jQuery.support = (function() {
 		// Where outerHTML is undefined, this still works
 		html5Clone: document.createElement("nav").cloneNode( true ).outerHTML !== "<:nav></:nav>",
 
+		// jQuery.support.boxModel DEPRECATED in 1.8 since we don't support Quirks Mode
+		boxModel: (document.compatMode === "CSS1Compat"),
+
 		// Will be defined later
 		submitBubbles: true,
 		changeBubbles: true,
@@ -95,9 +98,6 @@ jQuery.support = (function() {
 		boxSizingReliable: true
 	};
 
-	// jQuery.support.boxModel DEPRECATED in 1.8 since we don't support Quirks Mode
-	support.boxModel = (document.compatMode === "CSS1Compat");
-
 	// Make sure checked status is properly cloned
 	input.checked = true;
 	support.noCloneChecked = input.cloneNode( true ).checked;

test/unit/support.js

 module("support", { teardown: moduleTeardown });
 
-ok( jQuery.support.boxModel, "jQuery.support.boxModel is perpetually true since 1.8" );
+test("boxModel", function() {
+	expect( 1 );
+
+	equal( jQuery.support.boxModel, document.compatMode === "CSS1Compat" , "jQuery.support.boxModel is sort of tied to quirks mode but unstable since 1.8" );
+});
 
 testIframeWithCallback( "body background is not lost if set prior to loading jQuery (#9238)", "support/bodyBackground", function( color, support ) {
 	expect( 2 );