diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/README.txt | 7 | ||||
| -rw-r--r-- | tests/src/com/android/calculator2/EvaluatorTest.java | 59 |
2 files changed, 64 insertions, 2 deletions
diff --git a/tests/README.txt b/tests/README.txt index ee64f0c..b5e6dfe 100644 --- a/tests/README.txt +++ b/tests/README.txt @@ -6,7 +6,7 @@ adb install <tree root>/out/target/product/generic/data/app/ExactCalculator/Exac 3) adb install <tree root>/out/target/product/generic/data/app/ExactCalculatorTests/ExactCalculatorTests.apk 4) adb shell am instrument -w com.android.exactcalculator.tests/android.test.InstrumentationTestRunner -There are two kinds of tests: +There are three kinds of tests: 1. A superficial test of calculator functionality through the UI. This is a resurrected version of a test that appeared in KitKat. @@ -20,6 +20,9 @@ terminating decimal expansions. But it's also used to optimize CR computations, and bugs in BoundedRational could result in incorrect outputs.) +3. A quick test of Evaluator.testUnflipZeroes(), which we do not know how to +test manually. + We currently have no automatic tests for display formatting corner cases. The following numbers have exhibited problems in the past and would be good to test. Some of them are difficult to test automatically, because they @@ -27,7 +30,7 @@ require scrolling to both ends of the result. For those with finite decimal expansions, it also worth confirming that the "display with leading digits" display shows an exact value when scrolled all the way to the right. -Some interesting test cases: +Some interesting manual test cases: 10^10 + 10^30 10^30 + 10^-10 diff --git a/tests/src/com/android/calculator2/EvaluatorTest.java b/tests/src/com/android/calculator2/EvaluatorTest.java new file mode 100644 index 0000000..307aef2 --- /dev/null +++ b/tests/src/com/android/calculator2/EvaluatorTest.java @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2015 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.calculator2; + +import junit.framework.AssertionFailedError; +import junit.framework.TestCase; + +/** + * A test for a few static methods in Evaluator. + * The most interesting one is for unflipZeroes(), which we don't know how to test with + * real calculator input. + */ +public class EvaluatorTest extends TestCase { + private static void check(boolean x, String s) { + if (!x) throw new AssertionFailedError(s); + } + public void testUnflipZeroes() { + check(Evaluator.unflipZeroes("9.99", 2, "9.998", 3).equals("9.998"), "test 1"); + check(Evaluator.unflipZeroes("9.99", 2, "10.0000", 4).equals("9.9999"), "test 2"); + check(Evaluator.unflipZeroes("0.99", 2, "1.00000", 5).equals("0.99999"), "test 3"); + check(Evaluator.unflipZeroes("0.99", 2, "1.00", 2).equals("0.99"), "test 4"); + check(Evaluator.unflipZeroes("10.00", 2, "9.9999", 4).equals("9.9999"), "test 5"); + check(Evaluator.unflipZeroes("-10.00", 2, "-9.9999", 4).equals("-9.9999"), "test 6"); + check(Evaluator.unflipZeroes("-0.99", 2, "-1.00000000000000", 14) + .equals("-0.99999999999999"), "test 7"); + check(Evaluator.unflipZeroes("12349.99", 2, "12350.00000", 5).equals("12349.99999"), + "test 8"); + check(Evaluator.unflipZeroes("123.4999", 4, "123.5000000", 7).equals("123.4999999"), + "test 9"); + } + + public void testGetMsdIndexOf() { + check(Evaluator.getMsdIndexOf("-0.0234") == 4, "getMsdIndexOf(-0.0234)"); + check(Evaluator.getMsdIndexOf("23.45") == 0, "getMsdIndexOf(23.45)"); + check(Evaluator.getMsdIndexOf("-0.01") == Evaluator.INVALID_MSD, "getMsdIndexOf(-0.01)"); + } + + public void testExponentEnd() { + check(Evaluator.exponentEnd("xE-2%3", 1) == 4, "exponentEnd(xE-2%3)"); + check(Evaluator.exponentEnd("xE+2%3", 1) == 1, "exponentEnd(xE+2%3)"); + check(Evaluator.exponentEnd("xe2%3", 1) == 1, "exponentEnd(xe2%3)"); + check(Evaluator.exponentEnd("xE123%3", 1) == 5, "exponentEnd(xE123%3)"); + check(Evaluator.exponentEnd("xE123456789%3", 1) == 1, "exponentEnd(xE123456789%3)"); + } +} |