🧪 test: Factor out str function definition.

Author: make-github-pseudonymous-again

test/src/_fixtures.js

@@ -0,0 +1,5 @@
+export function str(any) {
+	const s = JSON.stringify(any);
+	if (s <= 40) return s;
+	return s.slice(0, 19) + '..' + s.slice(-19);
+}

test/src/concat.js

@@ -2,6 +2,8 @@ import test from 'ava';
 
 import {list, range, map} from '@aureooms/js-itertools';
 
+import {str} from './_fixtures.js';
+
 import {from, concat, iter} from '../../src/index.js';
 
 function macro(t, A, B) {
@@ -14,13 +16,7 @@ function macro(t, A, B) {
 	t.deepEqual(expected, result);
 }
 
-function string(array) {
-	const s = JSON.stringify(array);
-	if (s <= 40) return s;
-	return s.slice(0, 19) + '..' + s.slice(-19);
-}
-
-macro.title = (title, A, B) => title || `concat(${string(A)}, ${string(B)})`;
+macro.title = (title, A, B) => title || `concat(${str(A)}, ${str(B)})`;
 
 test(macro, [], []);
 test(macro, [], [1]);

test/src/from.js

@@ -2,6 +2,8 @@ import test from 'ava';
 
 import {list, range, map} from '@aureooms/js-itertools';
 
+import {str} from './_fixtures.js';
+
 import {from, iter} from '../../src/index.js';
 
 function macro(t, array) {
@@ -10,13 +12,7 @@ function macro(t, array) {
 	t.deepEqual(array, result);
 }
 
-function string(array) {
-	const s = JSON.stringify(array);
-	if (s <= 40) return s;
-	return s.slice(0, 19) + '..' + s.slice(-19);
-}
-
-macro.title = (title, array) => title || `from(${string(array)})`;
+macro.title = (title, array) => title || `from(${str(array)})`;
 
 test(macro, []);
 test(macro, [27]);

test/src/len.js

@@ -1,6 +1,7 @@
 import test from 'ava';
 
 import {list, range} from '@aureooms/js-itertools';
+import {str} from './_fixtures.js';
 import {from, len} from '../../src/index.js';
 
 const macro = (t, input) => {
@@ -10,12 +11,12 @@ const macro = (t, input) => {
 };
 
 macro.title = (title, input) =>
-	title || `len(from(${JSON.stringify(input)})) = ${input.length}`;
+	title || `len(from(${str(input)})) = ${input.length}`;
 
 test(macro, []);
 test(macro, '');
 test(macro, [{}]);
 test(macro, 'z');
 test(macro, [1, 2, 3]);
 test(macro, 'abracadabra');
-test('len(from(list(range(987)))) = 987', macro, list(range(987)));
+test(macro, list(range(987)));

test/src/pop.js

@@ -2,6 +2,8 @@ import test from 'ava';
 
 import {list, range, map} from '@aureooms/js-itertools';
 
+import {str} from './_fixtures.js';
+
 import {from, pop, iter} from '../../src/index.js';
 
 function throws(t, array) {
@@ -10,7 +12,7 @@ function throws(t, array) {
 	t.throws(() => pop(node), {message: /empty/});
 }
 
-throws.title = (title, array) => title || `pop(${string(array)}) ~> throws`;
+throws.title = (title, array) => title || `pop(${str(array)}) ~> throws`;
 
 function macro(t, array) {
 	const node = from(array);
@@ -21,13 +23,7 @@ function macro(t, array) {
 }
 
 macro.title = (title, array) =>
-	title || `pop(${string(array)}) ~> ${array[array.length - 1]}`;
-
-function string(array) {
-	const s = JSON.stringify(array);
-	if (s <= 40) return s;
-	return s.slice(0, 19) + '..' + s.slice(-19);
-}
+	title || `pop(${str(array)}) ~> ${array[array.length - 1]}`;
 
 test(throws, []);
 test(macro, [27]);

test/src/shift.js

@@ -2,6 +2,8 @@ import test from 'ava';
 
 import {list, range, map} from '@aureooms/js-itertools';
 
+import {str} from './_fixtures.js';
+
 import {from, shift, iter} from '../../src/index.js';
 
 function throws(t, array) {
@@ -10,7 +12,7 @@ function throws(t, array) {
 	t.throws(() => shift(node), {message: /empty/});
 }
 
-throws.title = (title, array) => title || `shift(${string(array)}) ~> throws`;
+throws.title = (title, array) => title || `shift(${str(array)}) ~> throws`;
 
 function macro(t, array) {
 	const node = from(array);
@@ -20,14 +22,7 @@ function macro(t, array) {
 	t.deepEqual(array.slice(1), result);
 }
 
-macro.title = (title, array) =>
-	title || `shift(${string(array)}) ~> ${array[0]}`;
-
-function string(array) {
-	const s = JSON.stringify(array);
-	if (s <= 40) return s;
-	return s.slice(0, 19) + '..' + s.slice(-19);
-}
+macro.title = (title, array) => title || `shift(${str(array)}) ~> ${array[0]}`;
 
 test(throws, []);
 test(macro, [27]);