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Add some more tests for nested formulas

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thepaperpilot 2023-02-04 18:51:11 -06:00
parent aebf318f83
commit 4e9a0f6cb5
2 changed files with 17 additions and 0 deletions
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2
src/game/formulas.ts
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@ -875,6 +875,8 @@ export default class Formula<T extends [FormulaSource] | FormulaSource[]> {
} }
invertIntegral(value: DecimalSource): DecimalSource { invertIntegral(value: DecimalSource): DecimalSource {
// This is nearly completely non-functional
// Proper nesting will require somehow using integration by substitution or integration by parts
return this.internalInvertIntegral?.call(this, value, ...this.inputs) ?? value; return this.internalInvertIntegral?.call(this, value, ...this.inputs) ?? value;
} }

15
tests/game/formulas.test.ts
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@ -563,6 +563,11 @@ describe("Inverting", () => {
}) })
); );
}); });
test("Inverting nested formulas", () => {
const formula = Formula.add(variable, constant).times(constant);
expect(formula.invert(100)).compare_tolerance(0);
});
}); });
describe("Integrating", () => { describe("Integrating", () => {
@ -643,6 +648,11 @@ describe("Integrating", () => {
// TODO I think these tests will require writing at least one known example for every function // TODO I think these tests will require writing at least one known example for every function
describe.todo("Integrable formulas integrate correctly"); describe.todo("Integrable formulas integrate correctly");
test("Integrating nested formulas", () => {
const formula = Formula.add(variable, constant).times(constant);
expect(formula.evaluateIntegral()).compare_tolerance(1500);
});
}); });
describe("Inverting integrals", () => { describe("Inverting integrals", () => {
@ -721,6 +731,11 @@ describe("Inverting integrals", () => {
// TODO I think these tests will require writing at least one known example for every function // TODO I think these tests will require writing at least one known example for every function
describe.todo("Invertible Integral formulas invert correctly"); describe.todo("Invertible Integral formulas invert correctly");
test("Inverting integral of nested formulas", () => {
const formula = Formula.add(variable, constant).times(constant);
expect(formula.invertIntegral(1500)).compare_tolerance(10);
});
}); });
describe("Step-wise", () => { describe("Step-wise", () => {