MDL-27659 "have evalmath accept numbers expressed with scientific

[moodle.git] / lib / simpletest / testmathslib.php

diff --git a/lib/simpletest/testmathslib.php b/lib/simpletest/testmathslib.php
index 4144c22..10dffcb 100644 (file)
--- a/lib/simpletest/testmathslib.php
+++ b/lib/simpletest/testmathslib.php
@@ -194,6 +194,24 @@ class mathsslib_test extends UnitTestCase {
 
     }
 
+    public function test_scientific_notation() {
+        $formula = new calc_formula('=10e10');
+        $this->assertWithinMargin($formula->evaluate(), 1e11, 1e11*1e-15);
+
+        $formula = new calc_formula('=10e-10');
+        $this->assertWithinMargin($formula->evaluate(), 1e-9, 1e11*1e-15);
+
+        $formula = new calc_formula('=10e+10');
+        $this->assertWithinMargin($formula->evaluate(), 1e11, 1e11*1e-15);
+
+        $formula = new calc_formula('=10e10*5');
+        $this->assertWithinMargin($formula->evaluate(), 5e11, 1e11*1e-15);
+
+        $formula = new calc_formula('=10e10^2');
+        $this->assertWithinMargin($formula->evaluate(), 1e22, 1e22*1e-15);
+
+    }
+
 }