🔍 test(native): Add more tests to pinpoint the exact spec.

Author: make-github-pseudonymous-again

test/src/decreasing.js

@@ -5,13 +5,25 @@ import * as compare from '../../src';
 test( "decreasing", t => {
 
 
-t.truthy( compare.decreasing( Infinity, 0 ) < 0, "double <" );
-t.truthy( compare.decreasing( Infinity, Infinity ) === 0, "double =" );
-t.truthy( compare.decreasing( 0, Infinity ) > 0, "double >" );
+t.true( compare.decreasing( Infinity, 0 ) < 0, "double <" );
+t.true( compare.decreasing( Infinity, Infinity ) === 0, "double =" );
+t.true( compare.decreasing( 0, Infinity ) > 0, "double >" );
 
-t.truthy( compare.decreasing( "abc", "ab" ) < 0, "string <" );
-t.truthy( compare.decreasing( "abc", "abc" ) === 0, "string =" );
-t.truthy( compare.decreasing( "ab", "abc" ) > 0, "string >" );
+t.true( compare.decreasing( "abc", "ab" ) < 0, "string <" );
+t.true( compare.decreasing( "abc", "abc" ) === 0, "string =" );
+t.true( compare.decreasing( "ab", "abc" ) > 0, "string >" );
+
+t.true( compare.decreasing( NaN , NaN ) !== 0 , 'NaN != NaN');
+t.true( compare.decreasing( NaN , 0 ) !== 0 , 'NaN != 0');
+t.true( compare.decreasing( 0 , NaN ) !== 0 , '0 != NaN');
+t.true( compare.decreasing( NaN , Infinity ) !== 0 , 'NaN != Infinity');
+t.true( compare.decreasing( Infinity , NaN ) !== 0 , 'Infinity != NaN');
+t.true( compare.decreasing( NaN , -Infinity ) !== 0 , 'NaN != -Infinity');
+t.true( compare.decreasing( -Infinity , NaN ) !== 0 , '-Infinity != NaN');
+
+t.true( compare.decreasing( new Date(1), new Date(1) ) !== 0, "this library is not suitable for date value equality checking" );
+t.true( compare.decreasing( new Date(0), new Date(1) ) > 0, "date >" );
+t.true( compare.decreasing( new Date(1), new Date(0) ) < 0, "date <" );
 
 
 });

test/src/increasing.js

@@ -5,13 +5,24 @@ import * as compare from '../../src';
 test( "increasing", t => {
 
 
-t.truthy( compare.increasing( 0, Infinity ) < 0, "double <" );
-t.truthy( compare.increasing( Infinity, Infinity ) === 0, "double =" );
-t.truthy( compare.increasing( Infinity, 0 ) > 0, "double >" );
+t.true( compare.increasing( 0, Infinity ) < 0, "double <" );
+t.true( compare.increasing( Infinity, Infinity ) === 0, "double =" );
+t.true( compare.increasing( Infinity, 0 ) > 0, "double >" );
 
-t.truthy( compare.increasing( "ab", "abc" ) < 0, "string <" );
-t.truthy( compare.increasing( "abc", "abc" ) === 0, "string =" );
-t.truthy( compare.increasing( "abc", "ab" ) > 0, "string >" );
+t.true( compare.increasing( "ab", "abc" ) < 0, "string <" );
+t.true( compare.increasing( "abc", "abc" ) === 0, "string =" );
+t.true( compare.increasing( "abc", "ab" ) > 0, "string >" );
 
+t.true( compare.increasing( NaN , NaN ) !== 0 , 'NaN != NaN');
+t.true( compare.increasing( NaN , 0 ) !== 0 , 'NaN != 0');
+t.true( compare.increasing( 0 , NaN ) !== 0 , '0 != NaN');
+t.true( compare.increasing( NaN , Infinity ) !== 0 , 'NaN != Infinity');
+t.true( compare.increasing( Infinity , NaN ) !== 0 , 'Infinity != NaN');
+t.true( compare.increasing( NaN , -Infinity ) !== 0 , 'NaN != -Infinity');
+t.true( compare.increasing( -Infinity , NaN ) !== 0 , '-Infinity != NaN');
+
+t.true( compare.increasing( new Date(1), new Date(1) ) !== 0, "this library is not suitable for date value equality checking" );
+t.true( compare.increasing( new Date(0), new Date(1) ) < 0, "date <" );
+t.true( compare.increasing( new Date(1), new Date(0) ) > 0, "date >" );
 
 });