Rename block_producer crate to block_proposer and change references inside it to block_proposer

eth2/block_proposer/src/test_utils/epoch_map.rs

@@ -0,0 +1,28 @@
+use crate::{DutiesReader, DutiesReaderError};
+use std::collections::HashMap;
+use types::{Epoch, Slot};
+
+pub struct EpochMap {
+    epoch_length: u64,
+    pub map: HashMap<Epoch, Slot>,
+}
+
+impl EpochMap {
+    pub fn new(epoch_length: u64) -> Self {
+        Self {
+            epoch_length,
+            map: HashMap::new(),
+        }
+    }
+}
+
+impl DutiesReader for EpochMap {
+    fn is_block_production_slot(&self, slot: Slot) -> Result<bool, DutiesReaderError> {
+        let epoch = slot.epoch(self.epoch_length);
+        match self.map.get(&epoch) {
+            Some(s) if *s == slot => Ok(true),
+            Some(s) if *s != slot => Ok(false),
+            _ => Err(DutiesReaderError::UnknownEpoch),
+        }
+    }
+}