79 lines
2 KiB
Rust
79 lines
2 KiB
Rust
use crate::sql::number::Number;
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use crate::sql::part::Part;
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use crate::sql::value::Value;
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impl Value {
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/// Synchronous method for decrementing a field in a `Value`
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pub(crate) fn dec(&mut self, path: &[Part], val: Value) {
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match self.pick(path) {
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Value::Number(v) => {
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if let Value::Number(x) = val {
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self.put(path, Value::from(v - x))
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}
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}
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Value::Array(v) => match val {
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Value::Array(x) => self.put(path, Value::from(v - x)),
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x => self.put(path, Value::from(v - x)),
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},
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Value::None => {
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if let Value::Number(x) = val {
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self.put(path, Value::from(Number::from(0) - x))
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}
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}
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_ => (),
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::sql::idiom::Idiom;
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use crate::syn::Parse;
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#[tokio::test]
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async fn decrement_none() {
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let idi = Idiom::parse("other");
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let mut val = Value::parse("{ test: 100 }");
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let res = Value::parse("{ test: 100, other: -10 }");
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val.dec(&idi, Value::from(10));
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assert_eq!(res, val);
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}
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#[tokio::test]
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async fn decrement_number() {
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let idi = Idiom::parse("test");
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let mut val = Value::parse("{ test: 100 }");
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let res = Value::parse("{ test: 90 }");
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val.dec(&idi, Value::from(10));
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assert_eq!(res, val);
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}
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#[tokio::test]
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async fn decrement_array_number() {
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let idi = Idiom::parse("test[1]");
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let mut val = Value::parse("{ test: [100, 200, 300] }");
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let res = Value::parse("{ test: [100, 190, 300] }");
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val.dec(&idi, Value::from(10));
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assert_eq!(res, val);
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}
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#[tokio::test]
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async fn decrement_array_value() {
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let idi = Idiom::parse("test");
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let mut val = Value::parse("{ test: [100, 200, 300] }");
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let res = Value::parse("{ test: [100, 300] }");
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val.dec(&idi, Value::from(200));
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assert_eq!(res, val);
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}
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#[tokio::test]
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async fn decrement_array_array() {
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let idi = Idiom::parse("test");
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let mut val = Value::parse("{ test: [100, 200, 300] }");
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let res = Value::parse("{ test: [200] }");
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val.dec(&idi, Value::parse("[100, 300]"));
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assert_eq!(res, val);
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}
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}
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