chore: move plain number tests from node-tests to unit-tests, rem…

…ove redundant tests (see #3011)

AUTHORS

@@ -217,7 +217,6 @@ Evan Miller <[email protected]>
 Timur <[email protected]>
 Ari Markowitz <[email protected]>
 Jay Wang <[email protected]>
-David Contreras <[email protected]
 Jaeu Jeong <[email protected]>
 cyavictor88 <[email protected]>
 David Contreras <[email protected]>
@@ -230,9 +229,9 @@ Michael Greminger <[email protected]>
 Kiku <[email protected]>
 MaybePixem <[email protected]>
 Aly Khaled <[email protected]>
-Praise Nnamonu <[email protected]>
 BuildTools <[email protected]>
 Anik Patel <[email protected]>
 Vrushaket Chaudhari <[email protected]>
+Praise Nnamonu <[email protected]>
 
 # Generated by tools/update-authors.js

HISTORY.md

@@ -1,5 +1,13 @@
 # History
 
+# unpublished changes since 11.11.0
+
+- Fix #2989: use one-based indices in `print` in the parser (#3009). 
+  Thanks @dvd101x. 
+- Fix #2936: `mod` sometimes giving wrong results due to internal round-off
+  errors (#3011). Thanks @praisennamonu1. 
+
+
 # 2023-09-05, 11.11.0
 
 - Implement function `corr` to calculate the correlation between two matrices

test/unit-tests/plain/number/arithmetic.test.js

@@ -0,0 +1,27 @@
+import assert from 'assert'
+import approx from '../../../../tools/approx.js'
+import { modNumber } from '../../../../src/plain/number/arithmetic.js'
+
+describe('mod', function () {
+  it('should calculate the modulus of two numbers', function () {
+    assert.strictEqual(modNumber(1, 1), 0)
+    assert.strictEqual(modNumber(0, 1), 0)
+    assert.strictEqual(modNumber(1, 0), 1)
+    assert.strictEqual(modNumber(0, 0), 0)
+    assert.strictEqual(modNumber(7, 0), 7)
+
+    approx.equal(modNumber(7, 2), 1)
+    approx.equal(modNumber(9, 3), 0)
+    approx.equal(modNumber(10, 4), 2)
+    approx.equal(modNumber(-10, 4), 2)
+    approx.equal(modNumber(8.2, 3), 2.2)
+    approx.equal(modNumber(4, 1.5), 1)
+    approx.equal(modNumber(0, 3), 0)
+    approx.equal(modNumber(-10, 4), 2)
+    approx.equal(modNumber(-5, 3), 1)
+  })
+
+  it('should calculate mod for negative divisor', function () {
+    assert.strictEqual(modNumber(10, -4), -2)
+  })
+})