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Merged
merged 4 commits into from
Mar 20, 2021
Merged

identity transform #262

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7f8236f
identity transform
mbostock Mar 20, 2021
8126108
fix tests
Fil Mar 20, 2021
56536a3
use Plot.valueof to test
mbostock Mar 20, 2021
81c8150
use Plot.valueof to test
mbostock Mar 20, 2021
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2 changes: 1 addition & 1 deletion src/mark.js
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Original file line number Diff line number Diff line change
Expand Up @@ -68,7 +68,7 @@ export function valueof(data, value, type) {

export const field = label => Object.assign(d => d[label], {label});
export const indexOf = (d, i) => i;
export const identity = d => d;
export const identity = {transform: d => d};
export const zero = () => 0;
export const string = x => x == null ? undefined : x + "";
export const number = x => x == null ? undefined : +x;
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12 changes: 6 additions & 6 deletions test/marks/bar-test.js
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Expand Up @@ -2,11 +2,11 @@ import * as Plot from "@observablehq/plot";
import tape from "tape-await";

tape("barX() has the expected defaults", test => {
const bar = Plot.barX();
test.strictEqual(bar.data, undefined);
const bar = Plot.barX([1, 2, 3]);
test.deepEqual(bar.data, [1, 2, 3]);
test.strictEqual(bar.transform, undefined);
test.deepEqual(bar.channels.map(c => c.name), ["x1", "x2"]);
test.deepEqual(bar.channels.map(c => c.value(1, 0)), [0, 1]);
test.deepEqual(bar.initialize().channels.map(d => d[1].value), [ [ 0, 0, 0 ], [ 1, 2, 3 ] ]);
test.deepEqual(bar.channels.map(c => c.scale), ["x", "x"]);
test.strictEqual(bar.fill, undefined);
test.strictEqual(bar.fillOpacity, undefined);
Expand Down Expand Up @@ -96,11 +96,11 @@ tape("barX(data, {x, y}) defaults x1 to zero and x2 to x", test => {
});

tape("barY() has the expected defaults", test => {
const bar = Plot.barY();
test.strictEqual(bar.data, undefined);
const bar = Plot.barY([1, 2, 3]);
test.deepEqual(bar.data, [1, 2, 3]);
test.strictEqual(bar.transform, undefined);
test.deepEqual(bar.channels.map(c => c.name), ["y1", "y2"]);
test.deepEqual(bar.channels.map(c => c.value(1, 0)), [0, 1]);
test.deepEqual(bar.initialize().channels.map(d => d[1].value), [ [ 0, 0, 0 ], [ 1, 2, 3 ] ]);
test.deepEqual(bar.channels.map(c => c.scale), ["y", "y"]);
test.strictEqual(bar.fill, undefined);
test.strictEqual(bar.fillOpacity, undefined);
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18 changes: 9 additions & 9 deletions test/marks/cell-test.js
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Expand Up @@ -2,11 +2,11 @@ import * as Plot from "@observablehq/plot";
import tape from "tape-await";

tape("cell() has the expected defaults", test => {
const cell = Plot.cell();
test.strictEqual(cell.data, undefined);
const cell = Plot.cell([[0, 1], [0, 2]]);
test.deepEqual(cell.data, [[0, 1], [0, 2]]);
test.strictEqual(cell.transform, undefined);
test.deepEqual(cell.channels.map(c => c.name), ["x", "y"]);
test.deepEqual(cell.channels.map(c => c.value([1, 2])), [1, 2]);
test.deepEqual(cell.initialize().channels.map(d => d[1].value), [[0, 0], [1, 2]]);
test.deepEqual(cell.channels.map(c => c.scale), ["x", "y"]);
test.strictEqual(cell.channels.find(c => c.name === "x").type, "band");
test.strictEqual(cell.channels.find(c => c.name === "y").type, "band");
Expand Down Expand Up @@ -77,21 +77,21 @@ tape("cell(data, {stroke}) allows stroke to be a variable color", test => {
});

tape("cellX() defaults x to identity and y to null", test => {
const cell = Plot.cellX();
test.strictEqual(cell.data, undefined);
const cell = Plot.cellX([12]);
test.deepEqual(cell.data, [12]);
test.strictEqual(cell.transform, undefined);
test.deepEqual(cell.channels.map(c => c.name), ["x"]);
test.deepEqual(cell.channels.map(c => c.value("foo")), ["foo"]);
test.deepEqual(cell.initialize().channels.map(d => d[1].value), [[ 12 ]]);
test.deepEqual(cell.channels.map(c => c.scale), ["x"]);
test.strictEqual(cell.channels.find(c => c.name === "x").type, "band");
});

tape("cellY() defaults y to identity and x to null", test => {
const cell = Plot.cellY();
test.strictEqual(cell.data, undefined);
const cell = Plot.cellY([12]);
test.deepEqual(cell.data, [12]);
test.strictEqual(cell.transform, undefined);
test.deepEqual(cell.channels.map(c => c.name), ["y"]);
test.deepEqual(cell.channels.map(c => c.value("foo")), ["foo"]);
test.deepEqual(cell.initialize().channels.map(d => d[1].value), [[ 12 ]]);
test.deepEqual(cell.channels.map(c => c.scale), ["y"]);
test.strictEqual(cell.channels.find(c => c.name === "y").type, "band");
});
12 changes: 6 additions & 6 deletions test/marks/rule-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,11 +2,11 @@ import * as Plot from "@observablehq/plot";
import tape from "tape-await";

tape("ruleX() has the expected defaults", test => {
const rule = Plot.ruleX();
test.strictEqual(rule.data, undefined);
const rule = Plot.ruleX([42]);
test.deepEqual(rule.data, [42]);
test.strictEqual(rule.transform, undefined);
test.deepEqual(rule.channels.map(c => c.name), ["x"]);
test.deepEqual(rule.channels.map(c => c.value("foo")), ["foo"]);
test.deepEqual(rule.initialize().channels.map(d => d[1].value), [[ 42 ]]);
test.deepEqual(rule.channels.map(c => c.scale), ["x"]);
test.strictEqual(rule.fill, undefined);
test.strictEqual(rule.fillOpacity, undefined);
Expand Down Expand Up @@ -96,11 +96,11 @@ tape("ruleX(data, {x, y1, y2}) specifies x, y1, y2", test => {
});

tape("ruleY() has the expected defaults", test => {
const rule = Plot.ruleY();
test.strictEqual(rule.data, undefined);
const rule = Plot.ruleY([42]);
test.deepEqual(rule.data, [42]);
test.strictEqual(rule.transform, undefined);
test.deepEqual(rule.channels.map(c => c.name), ["y"]);
test.deepEqual(rule.channels.map(c => c.value("foo")), ["foo"]);
test.deepEqual(rule.initialize().channels.map(d => d[1].value), [[ 42 ]]);
test.deepEqual(rule.channels.map(c => c.scale), ["y"]);
test.strictEqual(rule.fill, undefined);
test.strictEqual(rule.fillOpacity, undefined);
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12 changes: 6 additions & 6 deletions test/marks/tick-test.js
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Expand Up @@ -2,11 +2,11 @@ import * as Plot from "@observablehq/plot";
import tape from "tape-await";

tape("tickX() has the expected defaults", test => {
const tick = Plot.tickX();
test.strictEqual(tick.data, undefined);
const tick = Plot.tickX([42]);
test.deepEqual(tick.data, [42]);
test.strictEqual(tick.transform, undefined);
test.deepEqual(tick.channels.map(c => c.name), ["x"]);
test.deepEqual(tick.channels.map(c => c.value("foo", 0)), ["foo"]);
test.deepEqual(tick.initialize().channels.map(d => d[1].value), [[ 42 ]]);
test.deepEqual(tick.channels.map(c => c.scale), ["x"]);
test.strictEqual(tick.fill, undefined);
test.strictEqual(tick.fillOpacity, undefined);
Expand Down Expand Up @@ -61,11 +61,11 @@ tape("tickX(data, {stroke}) allows stroke to be a variable color", test => {
});

tape("tickY() has the expected defaults", test => {
const tick = Plot.tickY();
test.strictEqual(tick.data, undefined);
const tick = Plot.tickY([42]);
test.deepEqual(tick.data, [42]);
test.strictEqual(tick.transform, undefined);
test.deepEqual(tick.channels.map(c => c.name), ["y"]);
test.deepEqual(tick.channels.map(c => c.value("foo", 0)), ["foo"]);
test.deepEqual(tick.initialize().channels.map(d => d[1].value), [[ 42 ]]);
test.deepEqual(tick.channels.map(c => c.scale), ["y"]);
test.strictEqual(tick.fill, undefined);
test.strictEqual(tick.fillOpacity, undefined);
Expand Down