Fixed deprecations triggered from within asymmetricEqualityTesterArgCompatShim

lib/jasmine-core/jasmine.js

@@ -2902,10 +2902,7 @@ getJasmineRequireObj().asymmetricEqualityTesterArgCompatShim = function(j$) {
     matchersUtil,
     customEqualityTesters
   ) {
-    var self = Object.create(matchersUtil),
-      props,
-      i,
-      k;
+    var self = Object.create(matchersUtil);
 
     copyAndDeprecate(self, customEqualityTesters, 'length');
 
@@ -2913,18 +2910,30 @@ getJasmineRequireObj().asymmetricEqualityTesterArgCompatShim = function(j$) {
       copyAndDeprecate(self, customEqualityTesters, i);
     }
 
-    var props = arrayProps();
+    // Avoid copying array props if we've previously done so,
+    // to avoid triggering our own deprecation warnings.
+    if (!self.isAsymmetricEqualityTesterArgCompatShim_) {
+      copyAndDeprecateArrayMethods(self);
+    }
+
+    self.isAsymmetricEqualityTesterArgCompatShim_ = true;
+    return self;
+  }
+
+  function copyAndDeprecateArrayMethods(dest) {
+    var props = arrayProps(),
+      i,
+      k;
 
     for (i = 0; i < props.length; i++) {
       k = props[i];
+
       // Skip length (dealt with above), and anything that collides with
       // MatchesUtil e.g. an Array.prototype.contains method added by user code
-      if (k !== 'length' && !self[k]) {
-        copyAndDeprecate(self, Array.prototype, k);
+      if (k !== 'length' && !dest[k]) {
+        copyAndDeprecate(dest, Array.prototype, k);
       }
     }
-
-    return self;
   }
 
   function copyAndDeprecate(dest, src, propName) {

spec/core/asymmetricEqualityTesterArgCompatShimSpec.js

@@ -181,4 +181,18 @@ describe('asymmetricEqualityTesterArgCompatShim', function() {
       });
     });
   });
+
+  describe('When the matchersUtil is already an asymmetricEqualityTesterArgCompatShim', function() {
+    it('does not trigger any deprecations', function() {
+      var shim1 = jasmineUnderTest.asymmetricEqualityTesterArgCompatShim(
+        {},
+        []
+      );
+      spyOn(jasmineUnderTest.getEnv(), 'deprecated');
+
+      jasmineUnderTest.asymmetricEqualityTesterArgCompatShim(shim1, []);
+
+      expect(jasmineUnderTest.getEnv().deprecated).not.toHaveBeenCalled();
+    });
+  });
 });

src/core/asymmetricEqualityTesterArgCompatShim.js

@@ -51,10 +51,7 @@ getJasmineRequireObj().asymmetricEqualityTesterArgCompatShim = function(j$) {
     matchersUtil,
     customEqualityTesters
   ) {
-    var self = Object.create(matchersUtil),
-      props,
-      i,
-      k;
+    var self = Object.create(matchersUtil);
 
     copyAndDeprecate(self, customEqualityTesters, 'length');
 
@@ -62,18 +59,30 @@ getJasmineRequireObj().asymmetricEqualityTesterArgCompatShim = function(j$) {
       copyAndDeprecate(self, customEqualityTesters, i);
     }
 
-    var props = arrayProps();
+    // Avoid copying array props if we've previously done so,
+    // to avoid triggering our own deprecation warnings.
+    if (!self.isAsymmetricEqualityTesterArgCompatShim_) {
+      copyAndDeprecateArrayMethods(self);
+    }
+
+    self.isAsymmetricEqualityTesterArgCompatShim_ = true;
+    return self;
+  }
+
+  function copyAndDeprecateArrayMethods(dest) {
+    var props = arrayProps(),
+      i,
+      k;
 
     for (i = 0; i < props.length; i++) {
       k = props[i];
+
       // Skip length (dealt with above), and anything that collides with
       // MatchesUtil e.g. an Array.prototype.contains method added by user code
-      if (k !== 'length' && !self[k]) {
-        copyAndDeprecate(self, Array.prototype, k);
+      if (k !== 'length' && !dest[k]) {
+        copyAndDeprecate(dest, Array.prototype, k);
       }
     }
-
-    return self;
   }
 
   function copyAndDeprecate(dest, src, propName) {