LibJS: Add Math.pow()

3 files changed, 36 insertions, 0 deletions

diff --git a/Libraries/LibJS/Runtime/MathObject.cpp b/Libraries/LibJS/Runtime/MathObject.cpp
index a714123a3b..21287bd17d 100644
--- a/Libraries/LibJS/Runtime/MathObject.cpp
+++ b/Libraries/LibJS/Runtime/MathObject.cpp
@@ -48,6 +48,7 @@ MathObject::MathObject()
     put_native_function("sin", sin, 1);
     put_native_function("cos", cos, 1);
     put_native_function("tan", tan, 1);
+    put_native_function("pow", pow, 2);
 
     put("E", Value(M_E));
     put("LN2", Value(M_LN2));
@@ -180,4 +181,9 @@ Value MathObject::tan(Interpreter& interpreter)
     return Value(::tan(number.as_double()));
 }
 
+Value MathObject::pow(Interpreter& interpreter)
+{
+    return exp(interpreter, interpreter.argument(0), interpreter.argument(1));
+}
+
 }
diff --git a/Libraries/LibJS/Runtime/MathObject.h b/Libraries/LibJS/Runtime/MathObject.h
index 9a80d6689c..75901cbee4 100644
--- a/Libraries/LibJS/Runtime/MathObject.h
+++ b/Libraries/LibJS/Runtime/MathObject.h
@@ -50,6 +50,7 @@ private:
     static Value sin(Interpreter&);
     static Value cos(Interpreter&);
     static Value tan(Interpreter&);
+    static Value pow(Interpreter&);
 };
 
 }
diff --git a/Libraries/LibJS/Tests/Math.pow.js b/Libraries/LibJS/Tests/Math.pow.js
new file mode 100644
index 0000000000..b4e7670a1c
--- /dev/null
+++ b/Libraries/LibJS/Tests/Math.pow.js
@@ -0,0 +1,29 @@
+load("test-common.js");
+
+try {
+    assert(Math.pow(2, 0) === 1);
+    assert(Math.pow(2, 1) === 2);
+    assert(Math.pow(2, 2) === 4);
+    assert(Math.pow(2, 3) === 8);
+    assert(Math.pow(2, -3) === 0.125);
+    assert(Math.pow(3, 2) === 9);
+    assert(Math.pow(0, 0) === 1);
+    assert(Math.pow(2, Math.pow(3, 2)) === 512);
+    assert(Math.pow(Math.pow(2, 3), 2) === 64);
+    assert(Math.pow("2", "3") === 8);
+    assert(Math.pow("", []) === 1);
+    assert(Math.pow([], null) === 1);
+    assert(Math.pow(null, null) === 1);
+    assert(Math.pow(undefined, null) === 1);
+    assert(isNaN(Math.pow(NaN, 2)));
+    assert(isNaN(Math.pow(2, NaN)));
+    assert(isNaN(Math.pow(undefined, 2)));
+    assert(isNaN(Math.pow(2, undefined)));
+    assert(isNaN(Math.pow(null, undefined)));
+    assert(isNaN(Math.pow(2, "foo")));
+    assert(isNaN(Math.pow("foo", 2)));
+
+    console.log("PASS");
+} catch (e) {
+    console.log("FAIL: " + e);
+}