feat(floor): Provide example of op-centric organization

test/_pocomath.mjs

@@ -3,12 +3,12 @@ import PocomathInstance from '../src/core/PocomathInstance.mjs'
 import math from '../src/pocomath.mjs'
 
 describe('The default full pocomath instance "math"', () => {
-   it('has no undefined types', () => {
+   it('has no unexpected undefined types', () => {
       const undef = math.undefinedTypes()
       if (undef.length) {
-         console.log('Probable typo: found undefined types', undef)
+         console.log('NOTE: Found undefined types', undef)
       }
-      assert.strictEqual(undef.length, 0)
+      assert.strictEqual(undef.length, 1) // Mentioning 'Fraction' but not using
    })
 
    it('has a built-in typeOf operator', () => {

test/bigint/_all.mjs

@@ -64,4 +64,8 @@ describe('bigint', () => {
       assert.strictEqual(math.lcm(0n, 0n), 0n)
    })
 
+   it('allows floor as a no-op', () => {
+      assert.strictEqual(math.floor(-333n), -333n)
+   })
+
 })

test/complex/_all.mjs

@@ -51,4 +51,12 @@ describe('complex', () => {
          math.complex(4n, 5n))
    })
 
+   it('computes floor', () => {
+      assert.deepStrictEqual(
+         math.floor(math.complex(19, 22.7)),
+         math.complex(19, 22))
+      const gi = math.complex(-1n, 1n)
+      assert.strictEqual(math.floor(gi), gi) // literally a no-op
+   })
+
 })

test/custom.mjs

@@ -38,12 +38,20 @@ describe('A custom instance', () => {
       const pm = new PocomathInstance('piecemeal')
       pm.install(numbers)
       assert.strictEqual(pm.subtract(5, 10), -5)
+      assert.strictEqual(pm.floor(3.7), 3)
+      assert.throws(() => pm.floor(10n), TypeError)
       pm.install(complexAdd)
       pm.install(complexNegate)
       pm.install(complexComplex)
       // Should be enough to allow complex subtraction, as subtract is generic:
       assert.deepStrictEqual(
-         pm.subtract({re:5, im:0}, {re:10, im:1}), {re:-5, im: -1})
+         pm.subtract(pm.complex(5, 0), pm.complex(10, 1)),
+         math.complex(-5, -1))
+      // And now floor has been activated for Complex as well, since the type
+      // is present
+      assert.deepStrictEqual(
+         pm.floor(math.complex(1.9, 0)),
+         math.complex(1))
    })
 
    it("can defer definition of (even used) types", () => {

test/number/_all.mjs

@@ -37,4 +37,10 @@ describe('number', () => {
       assert.ok(math.largerEq(12.5, math.divide(25,2)))
    })
 
+   it('Computes floor', () => {
+      assert.strictEqual(math.floor(7), 7)
+      assert.strictEqual(math.floor(6.99), 6)
+      assert.strictEqual(math.floor(1-1e-13), 1)
+   })
+
 })